Krieger, Morris
McGraw-Hill, 1985
Buku Teks
Stultz, Russell Allen
Prentice-Hall, 1982
Buku Teks
Hult, Christine
Wadsworth, 1987
Buku Teks
Iwan Ariawan, author
Elex Media Komputindo, 1990
Buku Teks
Attridge, Catherina M., author
McGraw-Hill, 1983
Buku Teks